Atlas-Free Cervical Spinal Cord Segmentation on Midsagittal T2-Weighted Magnetic Resonance Images

Table 1

Signal intensities of different tissues on T2-weighted MR images. ALL: anterior longitudinal ligament; PLL: posterior longitudinal ligament; LF: ligamentum flavum.

Structure	Component	Signal intensity	Remark
Spinal cord		Isointense	Reference
Cerebrospinal fluid		Hyperintense
Vertebral body	Cortical bone	Hypointense
	Bone marrow	Isointense	May vary
	End plate	Hypointense
Intervertebral disk	Annulus fibrosus	Hypointense
	Nucleus pulposus	Hyperintense	Decreases with age
Ligaments (ALL, PLL, and LF)		Hypointense
Air		Very hypointense